docs: def ip_address(self,
                     container: Container
                     ) -> Union[IPv4Address, IPv6Address]:
          """
          The IP address used by a given container, or None if no IP address has
          been assigned to that container.
          """
          r = self.__api.get('containers/{}/ip'.format(container.uid))
          if r.status_code == 200:
              return r.json()
          self.__api.handle_erroneous_response(r)